CVE-2026-111732：解析 AR Vendor Block 請求時發生越界寫入
CVE-2026-111732 - Out-of-bounds write when parsing AR Vendor Block requests
P-Net 1.0.3 之前版本在啟用 PNET_OPTION_AR_VENDOR_BLOCKS 時，解析 ARVendorBlock 請求時會將非區塊定義欄位的資料長度作為複製長度，導致越界寫入，可能造成崩潰或任意程式碼執行。
P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution. This option is disabled by default.
Impact
Affected Products
The following products are affected by CVE-2026-111732
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
| ID | Vendor | Product | Action |
|---|---|---|---|
| 1 | Rt-labs | p-net |
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
Update P-Net to version 1.0.3 or later to fix buffer overflow and potential code execution.
- Update P-Net to version 1.0.3 or later.
- Ensure PNET_OPTION_AR_VENDOR_BLOCKS is disabled if not needed.
- Review security implications of enabled vendor blocks.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-111732 vulnerability anywhere in the article.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.